geico. fifteen minutes could save you fifteen percent or more on car insurance. when you take a closer look... ...at the best schools in the world... ...you see they all have something very interesting in common. they have teachers... ...with a deeper knowledge of their subjects. as a result, their students achieve at a higher level. let's develop more stars in education. let's invest in our teachers... ...so they can inspire our students. let's solve this. >>> back now with jack hanna, the director emeritus of the columbus zoo. as you can see, he has brought some more company. a snow leopard. frisky one. >> for me, you asked about elephants. this will get about four times this size. they live in the himalayas. they live at altitude. >> when there's so few of them, how do they find another to mate with? >> that's just it. good point. they are solitary cats. when she cycles, there's not enough of them to even find the other cat. >> can they mix mate with other breeds? >> no, not up there. that's been done before, lion and tiger, but not any other cats that i know